Equipment for manufacturing biomass solid fuel

Abstract

A manufacturing facility of biomass solid fuel includes: a preheater for preheating pellets; a heat source for preheating; a reactor that torrefies the pellets preheated by the preheater; a circulation path that connects a gas outlet and a gas inlet of the reactor and circulates torrefaction gas generated during torrefaction of the pellets in the reactor, a branch flow path branched from the circulation path to flow the torrefaction gas therethrough; a combustor that receives the torrefaction gas flowing through the branch flow path and combusts the torrefaction gas; a first heat exchanger provided in the circulation path; and a first combustion gas flow path connecting the combustor and the first heat exchanger to flow combustion gas generated in the combustor. The first heat exchanger exchanges heat between the combustion gas generated in the combustor and the torrefaction gas circulating in the circulation path.

1 . A manufacturing facility of biomass solid fuel configured to torrefy pellets comprising biomass to produce a biomass solid fuel, the manufacturing facility comprising:
 a preheater configured to preheat the pellets;   a heat source for preheating;   a reactor configured to torrefy the pellets preheated by the preheater;   a circulation path connecting a gas outlet of the reactor and a gas inlet of the reactor and configured to circulate a torrefaction gas generated during torrefaction of the pellets in the reactor;   a branch flow path branched from the circulation path and configured to flow the torrefaction gas therethrough;   a combustor configured to receive the torrefaction gas flowing through the branch flow path and combust the torrefaction gas;   a first heat exchanger provided in the circulation path; and   a first combustion gas flow path connecting the combustor and the first heat exchanger and configured to flow the combustion gas therethrough that is generated in the combustor,   the first heat exchanger being configured to exchange heat between the combustion gas generated in the combustor and the torrefaction gas circulating in the circulation path.   
     
     
         2 . The manufacturing facility of biomass solid fuel according to  claim 1 , further comprising:
 a heat generator connected to the preheater and configured to generate a heating gas; and   a heating gas introduction passage configured to introduce the heating gas generated in the heat generator into the preheater, wherein   the heating gas is the heat source for preheating.   
     
     
         3 . The manufacturing facility of biomass solid fuel according to  claim 2 , wherein
 the heat generator is a heater configured to heat a to-be-heated gas to generate the heating gas.   
     
     
         4 . The manufacturing facility of biomass solid fuel according to  claim 2 , further comprising:
 a second combustion gas flow path connecting the first heat exchanger and the heat generator and configured to flow the combustion gas therethrough, heat of which is exchanged in the first heat exchanger, wherein   the heat generator is configured to heat a to-be-heated gas with use of heat of the combustion gas flowing through the second combustion gas flow path to generate the heating gas.   
     
     
         5 . The manufacturing facility of biomass solid fuel according to  claim 3 , wherein the heating gas is generated by heating the to-be-heated gas with use of heat of the combustion gas. 
     
     
         6 . The manufacturing facility of biomass solid fuel according to  claim 1 , further comprising:
 a third combustion gas flow path connecting the first heat exchanger and the preheater, wherein   the combustion gas whose heat is exchanged in the first heat exchanger is introduced into the preheater through the third combustion gas flow path, and   the combustion gas whose heat is exchanged in the first heat exchanger is the heat source for preheating.   
     
     
         7 . The manufacturing facility of biomass solid fuel according to  claim 1 , further comprising:
 a fine powder separator provided between the gas outlet of the reactor and the first heat exchanger and configured to separate fine powder contained in the torrefaction gas generated in the reactor.